On 6/28/22, Anssi Saari wrote: > Lee writes: > >> I have a desktop and a laptop - neither one is picking up the ipv6 >> network prefix from the router advertisement. 'ifconfig -a' on both >> show a single 'inet6 fe80::' line under each interface. > > Well, how do you manage your network?
Poorly.. Verizon just enabled ipv6 in my area, so I'm trying to figure out how to get ipv6 working internally. > Is there a checkbox to check or uncheck somewhere? Yup - that was it. Netgate firewall had the DHCPv6 Server & RA set for Managed -- change it to Assisted and everything gets the ipv6 prefix info now. >> I checked with wireshark - the RAs look good. > > Checked how? Superficially :( The RA prefix information just had the On-link flag(L) After changing the DHCPv6 Server & RA router mode to assisted the RA prefix information had both the On-link flag(L) and the Autonomous address-configuration flag(A) set >> How do I get the default "accept_ra = 1" set on _all_ interfaces? > > You use sysctl -w to set those permanently. For testing, manipulate the > virtual files in /proc/sys/net/ipv6/conf/. > > Although, to me that looks OK, as in, it's what I have and for me IPv6 > works, weird as it is. Forwarding is off and accept_ra is like yours: > > net.ipv6.conf.all.accept_ra = 1 > net.ipv6.conf.default.accept_ra = 1 > net.ipv6.conf.docker0.accept_ra = 0 > net.ipv6.conf.enp5s0.accept_ra = 0 > net.ipv6.conf.lo.accept_ra = 1 > > and yet enp5s0 has a public IPv6 address. Same here. Forwarding is off, accept_ra is unchanged and yet ipv6 works for me now. https://sysctl-explorer.net/net/ipv6/accept_ra/ has this bit Possible values are: 0 Do not accept Router Advertisements. but router advertisements are clearly being accepted. .. or I'm not understanding what 'Router Advertisements' means. *sigh* Thanks Lee